Site preparation
3-8 Chapter 3: Installation 98-148248-C
3.2.6.1 ADU mast flange
For best performance provide a mast flange with a minimum of four gusset plates. To
prepare the mast flange do as follows:
1. Fit the top of the ADU mast with a flange with clearance holes matching the bushings in
the radome and with minimum 4 gusset plates. No center hole is necessary in the
flange.
• Flange thickness: Minimum 5 mm.
• 4 gusset plates: Minimum 5 mm thick, must be placed as close as possible to the
holes in the mounting plate and evenly distributed.
2. Make sure that the recommended flatness on the mast mount plateau is below 3,0 mm.
3. Allow sufficient space so the nut is free of the welded seam and there is room for tools
(min. 50 mm).
Figure 3-6: ADU mast flange, top and side view (measures in mm)
200
200
200
200
min. 5
min. 5
min. 80
350
20 2
(As close as possible)
min. 5
SCALE 3:10
DETAIL A
Min. four gussets
Figure 3-7: ADU mast flange, recommended flatness on the mast mount
plateau
CAUTION! Avoid sharp edges where the flange is in direct contact with
the radome. Round all edges as much as possible to avoid damaging the
surface of the radome.
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